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Nanowire electrode material and its preparation method and application

A technology of electrode materials and nanowires, applied in nanotechnology, nanotechnology, metal material coating technology, etc., can solve the problems that nanowires are not easy to disperse, easy to appear "agglomeration, complex formation process, etc., and easy to realize large-scale production , Improve the utilization rate and the effect of high capacity retention rate

Active Publication Date: 2021-06-04
BEIJING INST OF NANOENERGY & NANOSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the need to use templates in the preparation of nanowire materials in the prior art, which is difficult to industrialize; the formation process is complicated, the production cost is high, and the output is low; after the nanowires are dried, the nanowires are not easy to disperse, and "" In order to solve the problem of "agglomeration", provide nanowire electrode materials and their preparation methods and applications. The preparation of nanowire electrode materials by this method has low production cost, simple process, high yield, no "agglomeration" phenomenon, and is easy to realize large-scale production

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  • Nanowire electrode material and its preparation method and application
  • Nanowire electrode material and its preparation method and application
  • Nanowire electrode material and its preparation method and application

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preparation example Construction

[0045] The first aspect of the present invention provides a method for preparing a nanowire electrode material, wherein the method includes the following steps:

[0046] (1) forming a plurality of nanowire intermediates on the surface of the substrate;

[0047] (2) forming at least one cladding layer on the surface of the nanowire intermediate;

[0048] Optionally, (3) subjecting the product obtained in step (2) to a reduction reaction to convert the nanowire intermediate into a reduced nanowire.

[0049] In the present invention, the nanowire electrode material refers to an electrode material having a nanowire structure, and the aspect ratio of the nanowire is above 1000. In the prior art, nanowires parallel to the substrate, or nanowires perpendicular to the substrate can be prepared, but the prepared nanowires perpendicular to the substrate are prone to "agglomeration" defects. In the present invention, the prepared nanowires can be parallel to the surface of the substrat...

Embodiment 1

[0125] (1) Preparation of copper nanowire intermediate

[0126] Immerse the polished and cleaned copper substrate in 200ml of a mixed solution of sodium hydroxide solution (concentration: 3mol / L) and sodium persulfate solution (concentration: 0.1mol / L), react at 30°C for 2h, as image 3 shown (7 copper substrates), from image 3 The color photo (not shown) shows that a layer of blue nanowire intermediates is formed on the copper substrate.

[0127] Place the copper sheet substrate with the nanowire intermediate on the surface on the FEI / Nova Nano SEM 450 model field emission scanning electron microscope (purchased from FEI company, the model is Nova Nano SEM 450) to observe the surface morphology, and the observation results are as follows figure 1 shown, from figure 1 The nanowire structure can be clearly identified.

[0128] The surface is formed with the copper sheet substrate of nanowire intermediate in X-ray diffractometer (purchased from Holland PANalytical company,...

Embodiment 2

[0137] With the copper nanowire electrode material that embodiment 1 obtains as the negative electrode current collector of lithium-ion battery, by magnetron sputtering apparatus, vacuum degree is 10 -4 Pa, under the condition of 150W power, magnetron sputtering carbon for 3h, forming a carbon coating layer on the surface of the copper nanowire negative electrode current collector, and obtaining the copper / carbon nanowire electrode material.

[0138] The copper / carbon nanowire electrode material was observed on the surface morphology of the FEI / Nova Nano SEM 450 model field emission scanning electron microscope, and the observation results were as follows Figure 8 shown, from Figure 8 The nanowire structure can be clearly identified.

[0139] The copper / carbon nanowire electrode material is used as the negative plate material of the lithium ion battery, and the lithium ion battery is assembled.

[0140] The specific operation is: directly slice the copper / carbon nanowire e...

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Abstract

The invention relates to the field of electrode materials, and discloses a nanowire electrode material, a preparation method and an application thereof. A method for preparing a nanowire electrode material, the method comprising the following steps: (1) forming a plurality of nanowire intermediates on the surface of a substrate; (2) forming at least one coating layer on the surface of the nanowire intermediates; Optionally, (3) subjecting the product obtained in step (2) to a reduction reaction to convert the nanowire intermediate into a reduced nanowire. The nanowire electrode material prepared by the method has the advantages of low production cost, simple process, high output, no "agglomeration" phenomenon, and easy realization of large-scale production. Using the prepared nanowire electrode material as the current collector or electrode of the battery has the advantages of high capacity and long cycle life; using it as a capacitor has good charge and discharge performance; using it as a supercapacitor has high capacity retention and Advantages of long cycle life.

Description

technical field [0001] The invention relates to the field of energy materials, in particular to a nanowire electrode material and its preparation method and application. Background technique [0002] Nanowires include metal nanowires (such as: Cu, Ni, Ag, Pt, Au, etc.) and semiconductor nanowires (such as: ZnO, Si, GaN, Cu 2 O, etc.). There are mainly two types of nanowires formed, namely, nanowires perpendicular to the substrate plane and nanowires parallel to the substrate plane. Nanowires can be used in energy conversion fields such as batteries and capacitors, next-generation computing devices, piezoelectric electronics, etc. , touch screens of mobile computers, electronic signature technology and nano generators. It is not difficult to prepare nanowires parallel to the substrate plane, but it is a technical difficulty to prepare a large number of metal nanowires perpendicular to the substrate plane at the same time. The corresponding metal compounds are easy to agglom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/26C23C28/00C23F1/00B82Y40/00B82Y30/00
CPCC23C28/00C23F1/00B82Y30/00B82Y40/00B22F9/26B22F1/0547B22F1/16
Inventor 张在磊马闻达卢宪茂
Owner BEIJING INST OF NANOENERGY & NANOSYST